Institute Newton C. Braga

Circuit Bench

Voltage to Frequency Converter LM331 (CB14339E)
The circuit shown is from National Semiconductor, having been found in the 1994 Linear Application...
Grounding test (CB10092E)
This simple circuit for a common 110 V power grid was found in a 1980s American documentation. The circuit uses...
Proximity Alarm or Touch Sensor (CB16118E)
This device can be used as a proximity arm, touch sensor or electronic bell. When connected to a...